出生后3个月动脉导管发生解剖关闭的机会为A．40% B．20% C．60% D．80

认真阅读短文，判断句子的正误，正确的打“√”，错误的打“×”。

　　　　　　　　　　　　　　　A Picture of Our School

      Look! This is a picture of our school. There is a tall building in the middle of the picture. There is a big

playground in front of the building. There are many trees and flowers near the playground. The trees are green.

The flowers are red and yellow. And there are many boys and girls on the playground. They're playing games.

There is a house near the building. It's our school library (图书馆). And our department (公寓) is next to it.

We all like our school very much.

( ) 1. There is a big playground in the middle of the picture.

( ) 2. This is a picture of their school.

( ) 3. There are many flowers and trees in our school.

( ) 4. Many students are playing games on the playground.

( ) 5. Our school library is near the tall building.

一朵花中有几个雌蕊，每个雌蕊由一个心皮组成，称为（）。

A.单雌蕊

B.离生雌蕊

C.复雌蕊

D.单复雌蕊

治疗薛某急性心绞痛，其刺激及针感应是（）

A.轻刺激，少行针

B.中度刺激，适当行针

C.强刺激，多行针

D.得气为度，不再行针

E.留针期间，一次行针

拉马克学说的主要内容有哪些？

经济节能运行的措施有：（）

A、合理确定开停机时间

B、合理使用室外新风

C、防止房间过冷或过热

D、合理确室温标准

E、水泵采用变流量运行